No.... that's the good thing about warband. You need to play a bit, to learn how maps look like... In native we gave all places a name (like archway, middle, left/right ruins, village, small hill on ruins map), on all native maps (6 or 7) and by some practice everyone new the place's name by heart. ;)
This, like showing banners for enemy players, would be a step in the wrong direction. A bit to ruin the game.